Use the data from your completed and accurate excel file to answer the following questions. Enter your answers on the course website.

What is the arrival rate? $($Calls per minute$)$

What is the service rate? $($Calls per minute$)$

What percentage of the time is the server busy in a one$-$server model?

What percentage of the time is the server busy in a two$-$server model?

What percentage of the time is the server busy in a three$-$server model?

What is the probability the system is empty in a single$-$server model?

What is the probability of exactly $2$ customers in the system in a single$-$server model?

What is the probability of exactly $5$ customers in the system in a single$-$server model?

On average, how many customers are in the system in a single server model?

On average, how many customers are in the line in a single server model?

On average, how much time does a customer spend in the system in a single$-$server model? $($minutes$)$

On average, how much time does a customer spend on hold in a single$-$server model? $($minutes$)$

As we leamed in the lecture, it is recommended you draw a picture of the underlined section of each question. Then draw a number line that will help you represent the entire statement. Hopefully, that will help you more easily get the correct answer.

$13.$ What is the probability there are